From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: marc.zyngier@arm.com, catalin.marinas@arm.com,
will.deacon@arm.com, Julien Grall <julien.grall@arm.com>
Subject: [PATCH RFC 10/14] arm64/mm: Introduce a callback to flush the local context
Date: Thu, 21 Mar 2019 16:36:19 +0000 [thread overview]
Message-ID: <20190321163623.20219-11-julien.grall@arm.com> (raw)
In-Reply-To: <20190321163623.20219-1-julien.grall@arm.com>
Flushing the local context will vary depending on the actual user of the ASID
allocator. Introduce a new callback to flush the local context and move
the call to flush local TLB in it.
Signed-off-by: Julien Grall <julien.grall@arm.com>
---
arch/arm64/mm/context.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index cbf1c24cb3ee..678a57b77c91 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -39,6 +39,8 @@ struct asid_info
cpumask_t flush_pending;
/* Number of ASID allocated by context (shift value) */
unsigned int ctxt_shift;
+ /* Callback to locally flush the context. */
+ void (*flush_cpu_ctxt_cb)(void);
} asid_info;
#define active_asid(info, cpu) *per_cpu_ptr((info)->active, cpu)
@@ -266,7 +268,7 @@ static void asid_new_context(struct asid_info *info, atomic64_t *pasid,
}
if (cpumask_test_and_clear_cpu(cpu, &info->flush_pending))
- local_flush_tlb_all();
+ info->flush_cpu_ctxt_cb();
atomic64_set(&active_asid(info, cpu), asid);
raw_spin_unlock_irqrestore(&info->lock, flags);
@@ -298,6 +300,11 @@ asmlinkage void post_ttbr_update_workaround(void)
CONFIG_CAVIUM_ERRATUM_27456));
}
+static void asid_flush_cpu_ctxt(void)
+{
+ local_flush_tlb_all();
+}
+
/*
* Initialize the ASID allocator
*
@@ -308,10 +315,12 @@ asmlinkage void post_ttbr_update_workaround(void)
* 2.
*/
static int asid_allocator_init(struct asid_info *info,
- u32 bits, unsigned int asid_per_ctxt)
+ u32 bits, unsigned int asid_per_ctxt,
+ void (*flush_cpu_ctxt_cb)(void))
{
info->bits = bits;
info->ctxt_shift = ilog2(asid_per_ctxt);
+ info->flush_cpu_ctxt_cb = flush_cpu_ctxt_cb;
/*
* Expect allocation after rollover to fail if we don't have at least
* one more ASID than CPUs. ASID #0 is always reserved.
@@ -332,7 +341,8 @@ static int asids_init(void)
{
u32 bits = get_cpu_asid_bits();
- if (!asid_allocator_init(&asid_info, bits, ASID_PER_CONTEXT))
+ if (!asid_allocator_init(&asid_info, bits, ASID_PER_CONTEXT,
+ asid_flush_cpu_ctxt))
panic("Unable to initialize ASID allocator for %lu ASIDs\n",
1UL << bits);
--
2.11.0
next prev parent reply other threads:[~2019-03-21 16:37 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 16:36 [PATCH RFC 00/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
2019-03-21 16:36 ` [PATCH RFC 01/14] arm64/mm: Introduce asid_info structure and move asid_generation/asid_map to it Julien Grall
2019-03-21 17:03 ` Suzuki K Poulose
2019-03-21 17:27 ` Julien Grall
2019-03-21 16:36 ` [PATCH RFC 02/14] arm64/mm: Move active_asids and reserved_asids to asid_info Julien Grall
2019-03-21 16:36 ` [PATCH RFC 03/14] arm64/mm: Move bits " Julien Grall
2019-03-21 16:36 ` [PATCH RFC 04/14] arm64/mm: Move the variable lock and tlb_flush_pending " Julien Grall
2019-03-21 16:36 ` [PATCH RFC 05/14] arm64/mm: Remove dependency on MM in new_context Julien Grall
2019-03-21 16:36 ` [PATCH RFC 06/14] arm64/mm: Store the number of asid allocated per context Julien Grall
2019-03-21 16:36 ` [PATCH RFC 07/14] arm64/mm: Introduce NUM_ASIDS Julien Grall
2019-03-21 16:36 ` [PATCH RFC 08/14] arm64/mm: Split asid_inits in 2 parts Julien Grall
2019-03-21 16:36 ` [PATCH RFC 09/14] arm64/mm: Split the function check_and_switch_context in 3 parts Julien Grall
2019-03-21 16:36 ` Julien Grall [this message]
2019-03-21 16:36 ` [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file Julien Grall
2019-06-05 16:56 ` Julien Grall
2019-06-05 20:41 ` Palmer Dabbelt
2019-06-11 1:56 ` Gary Guo
2019-06-19 8:07 ` Guo Ren
2019-06-19 8:54 ` Julien Grall
2019-06-19 9:12 ` Will Deacon
2019-06-19 12:18 ` Guo Ren
2019-06-19 12:39 ` Will Deacon
2019-06-20 9:33 ` Guo Ren
2019-06-24 10:40 ` Will Deacon
2019-06-25 7:25 ` Palmer Dabbelt
2019-09-07 23:52 ` Guo Ren
2019-09-12 14:02 ` Will Deacon
2019-09-12 14:59 ` Guo Ren
2019-09-13 7:13 ` Guo Ren
2019-09-14 8:49 ` Guo Ren
2019-09-16 12:57 ` Jean-Philippe Brucker
2019-09-19 13:07 ` Guo Ren
2019-09-19 15:18 ` Jean-Philippe Brucker
2019-09-20 0:07 ` Guo Ren
2019-09-20 7:18 ` Jean-Philippe Brucker
2019-09-14 14:01 ` Palmer Dabbelt
2019-09-15 5:03 ` Anup Patel
2019-09-16 18:18 ` Will Deacon
2019-09-16 18:28 ` Palmer Dabbelt
2019-09-17 3:42 ` Anup Patel
2019-09-19 13:36 ` Guo Ren
2019-06-19 11:51 ` Guo Ren
2019-06-19 12:52 ` Julien Grall
2019-06-21 14:16 ` Catalin Marinas
2019-06-23 16:35 ` Guo Ren
2019-06-24 10:22 ` Will Deacon
2019-06-27 9:41 ` qi.fuli
2019-06-27 10:26 ` Will Deacon
2019-06-24 15:38 ` Catalin Marinas
2019-06-30 4:29 ` Guo Ren
2019-07-01 9:17 ` Catalin Marinas
2019-07-16 3:31 ` Guo Ren
2019-07-22 16:38 ` Catalin Marinas
2019-03-21 16:36 ` [PATCH RFC 12/14] arm64/lib: asid: Allow user to update the context under the lock Julien Grall
2019-03-21 16:36 ` [PATCH RFC 13/14] arm/kvm: Introduce a new VMID allocator Julien Grall
2019-03-21 16:36 ` [PATCH RFC 14/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
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